I would add that Cuban has no carb hole compared with other bricks, instead of the restrictor disc on SBL or a dome screen on the NOVA, you have a ceramic flame guard that also acts as a thermal diffuser, hence the tighter restriction (the design of a traditional pipe path also reduces it).
Heating is very stable and AVB is uniform. It also has an SS flame intake instead of glass, which makes the Cuban certainly one of the easiest to use vapes in this range (it's pretty hard to combust or break because it's very durable too). Note that the SS bowl is relatively big and allows long sessions with occasional stirring and this one is fully removable for deep cleaning.
The small size and excellent design/manufacturing of Retrosteam products make them a sure bet. What's more, the possibilities offered by these products are quite extensive, as everything is removable. In addition, RO explain that they are working on an electronic top that would avoid the use of butane, making it very versatile